pocketmine\level\format\leveldb\LevelDB::generate PHP Method

    public static function generate($path, $name, $seed, $generator, array $options = [])
    {
        if (!file_exists($path)) {
            mkdir($path, 0777, true);
        }
        if (!file_exists($path . "/db")) {
            mkdir($path . "/db", 0777, true);
        }
        //TODO, add extra details
        $levelData = new CompoundTag("", ["hardcore" => new ByteTag("hardcore", 0), "initialized" => new ByteTag("initialized", 1), "GameType" => new IntTag("GameType", 0), "generatorVersion" => new IntTag("generatorVersion", 1), "SpawnX" => new IntTag("SpawnX", 128), "SpawnY" => new IntTag("SpawnY", 70), "SpawnZ" => new IntTag("SpawnZ", 128), "version" => new IntTag("version", 19133), "DayTime" => new IntTag("DayTime", 0), "LastPlayed" => new LongTag("LastPlayed", microtime(true) * 1000), "RandomSeed" => new LongTag("RandomSeed", $seed), "SizeOnDisk" => new LongTag("SizeOnDisk", 0), "Time" => new LongTag("Time", 0), "generatorName" => new StringTag("generatorName", Generator::getGeneratorName($generator)), "generatorOptions" => new StringTag("generatorOptions", isset($options["preset"]) ? $options["preset"] : ""), "LevelName" => new StringTag("LevelName", $name), "GameRules" => new CompoundTag("GameRules", [])]);
        $nbt = new NBT(NBT::LITTLE_ENDIAN);
        $nbt->setData($levelData);
        $buffer = $nbt->write();
        file_put_contents($path . "level.dat", Binary::writeLInt(3) . Binary::writeLInt(strlen($buffer)) . $buffer);
        $db = new \LevelDB($path . "/db");
        $db->close();
    }